J Integr Plant Biol. ›› 1995, Vol. 37 ›› Issue (9): -.

• Research Articles •    

A Preliminary Study on Genetic Structure of Liaodong Oak (Quercus liaotungensis) Populations in Dry and Moist Habitats and It's Adaptive Implications

Zhong Min, Wang Hong-xin, Hu Zhi-ang and Qian Ying-qian   

Abstract: The genetic structure of two Liaodong oak (Ouercus liaotungensis Koiz. ) populations whose habitats represent respectively moist and dry donditions at Dongling Mountain region, a suburb of Beijing City, was studied by using isozyme analysis. Thirty putative loci from thirteen enzyme systems were analyzed. The result showed very high genetic variability in the two populations, with a percentage of polymorphic loci of 86.6%, and an average number of alleles per locus of 2.25. There still existed obvious differences in a few loci although high levels of genetic similarity was observed, indicated by low value of both distance (D= 0. 029) and coefficient of gene differentiation (GsT = 0. 048). The dynamic changes of the gene frequencies of different age groups of oak trees may imply that the oak populations can be adaptive to different conditions.

Key words: Ouercus liaotungensis, Isozyme, Genetic structure, Water condition, Adaptation

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